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- Of hydrogen atom or hydrogen-like ions, the elliptic orbit, energy, orbital velocity, period and quantization are discussed in brief and perfection. 对氢原子或类氢离子中电子的椭圆轨道和能量及其量子化等给出了一个简明、完善的讨论.
- elliptic orbiting velocity 椭圆轨道速度
- It is impossible that the man-made satellite never loses its orbit velocity. 人造卫星永久保持轨道速度是不可能的。
- Pluto has an elliptic orbit. 冥王星的轨道是椭圆形的。
- By using elementary mathematics, a derivation of elliptic orbit and energy of electron in Hydrogen atom is given. 利用椭圆的几何性质确定类氢原子的轨道，并计算其能级.
- By using elementary mathematics, the condition of quantum of the elliptic orbit of electron in hydrogen atom is given. 利用椭圆的几何性质，确定氢原子椭圆轨道的量子化条件。
- Chaotic planar libration and its control of a magnetic rigid spacecraft with internal damping in an elliptic orbit near the equatorial plane of the earth are investigated. 研究在地球万有引力场和磁场中具有结构内阻尼的磁性刚体航天器在近赤道椭圆轨道上平面天平动的混沌行为及其控制.
- Deviating from a circular form or path,as in an elliptical orbit. 偏离轨道运行的偏离圆周轨道或路线，如椭圆轨道
- Deviating from a circular form or path, as in an elliptical orbit. 偏离轨道运行的:偏离圆周轨道或路线,如椭圆轨道。
- Engineers realized that the plane would never be able to reach orbital velocity on its own. 工程师们已经认识到，这种喷气机自己永远不能达到地球轨道的速度。
- Through the analysis of the movement of SAR satellite,the expressions of Doppler properties of an elliptic orbit space-borne SAR interms of its aspects(roll,pitch,yaw) are derived. 通过对SAR卫星运动的分析,推导出椭圆轨道星载SAR考虑姿态角(横滚、俯仰、偏航)的多普勒性质的表达式。
- Through the analysis of the movement of SAR satellite, the expressions of Doppler properties of an elliptic orbit space-borne SAR interms of its aspects (roll, pitch, yaw) are derived. 摘要通过对SAR卫星运动的分析，推导出椭圆轨道星载SAR考虑姿态角（横滚、俯仰、偏航）的多普勒性质的表达式。
- The bulk of the solar system's mass is contained in the sun, and the orbital velocity of the planets decreases with distance.Mercury trundles around the sun much faster than Earth does, for example. 太阳系就是这样：太阳系的质量主要集中在太阳，行星离太阳愈远，轨道速度就愈小（如水星绕太阳的速度就比地球快多了）。
- The engine operated for 63 seconds. The elliptical orbit was changed to a near circular orbit. 飞船变轨,变轨发动机工作了63秒,使原来的椭圆形接近圆形。
- If the satellite has an elliptical orbit, the result is a spiral wave, a miniature version of the pinwheel pattern of our galaxy. 如果卫星的轨道是椭圆的，就会产生螺旋波，就像是银河系纸风车形状的缩影。
- The moon travels in an elliptical orbit in relation to the equator, swinging back and forth over the northern and southern hemispheres. 月球在与赤道相对的椭圆形轨道上运行，往返于南北半球的上空。
- LRO will then enter an elliptical orbit (called the commissioning orbit) from which it will move into its final orbit. 届时，LRO将进入一个椭圆形轨道（被称为试运行轨道），由此它将进入最终轨道。
- The moon travels in an elliptical orbit in relation to the equator,swinging back and forth over the northern and southern hemispheres. 月球在与赤道相对的椭圆形轨道上运行，往返于南北半球的上空。
- Gazelles can move with astonishing velocity. 羚羊跑起来速度惊人。
- Firstly,the relative motion between the chaser and the target is described using Tschauner-Hempel equations to describe the relative motion of two spacecraft in an arbitrary elliptic orbits. 首先从一般性出发对追踪星与非合作目标之间的椭圆轨道相对运动方程进行分析,给出具有任意初始条件的相对运动方程解析表达式。
